Tap-socket.



PATENTED FEB. 19, 1907.

G. J. HBISER.

TAP SOCKET.

APPLIOATION FILED JULYs, 1906.

s. W M r, Mw fl, W /r Wr y ing at East Pittsburg, inthe county of Alle- .enlarged perspective view of a driver-head,

CHARLES J. HEISER, OF EAST PITTSBURG, PENNSYLVANIA.

TAP-SOCKET.

- Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed J'uly 3,1906. Serial No. 324,683.

T0 all lull/0111, t 71149;/ concern:

13e it known that I, CHARLES J. I IEISER, a citizen of the United States of America, residgheny and State of Pennsylvania, have invented certain new and usefulImprovements in Ta -Sockets, of which the following is a speci cation, reference being had therein to the accompanying drawings.

This invention relates to tap-sockets particularly designed to be secured to or form a art of the spindle of a drilling-machine,

athe, or ta ping-machine for the purpose of drilling an tapping holes or `setting threaded studs or similar operations. l

The object of this-invention is to provide a flexible connection between the driving mechanism and the tap to permit the tap to stop or lag when for any reason the resistance is increased beyond a safe limit when a piece of material is being operated upon.

Another object of my invention is to provide an automatic device for controlling and protecting a tap, drill, bit, or similar instrument, said device being positive in its action, simple and inexpensive, and free from danger of injury by ordinary use.

l/Vith the above and other objects in view, which -will more readily appear as the invention is better understood, the invention consists in the novel construction, combination, and arrangement of parts, to be presently described in detail and specifically pointed out in the appended claims.

In the drawings forming part of this speciiication, Figure 1 is an elevation of m improved tap-socket. Fig. 2 is a vertica sectional view of the same, artly in elevation. Fig. 3 is a cross-sectionalpview taken on the line .fr :c of Fig. 2. Fig. 4 is a similar view taken on the line 'y y of Fig. 2. Fig. 5 is an and Fig. 6 is an elevation of the driven tapholder.

The socket consists of a sleeve 1, the one I end of which is exteriorly threaded, as at 2, l and interi orly threaded, as 3, While the opposite end of the sleeve is exteriorly threaded, as at 4, The sleeve is formed intermediate its ends with a horizontal partition 5, having a rectangular or oblong opening 6 formed therein, adapted to receive a rectangular block orlug 7, carried by a driver-head 8. rlhe head normally rests upon the partition and is tem orarilyheld thereon by a coiled spring 9, wiich is retained in the sleeve 1 by adjustable means adapted to govern the tension of said spring.l

Upon the top of the spring 9 is mounted a vwasher 10, engaged by a plurality of pins 11,

said pins extendlng throu h a shank-head 12, which is detachably held 1n the sleeve by the threads 3 thereof. The head 12 carries a conventional form of Shank 14, adapted to lbe connected to and revolved by a drilling or tapping machine. Mounted upon the upper ends of pins 11,which protrude above the head 12, is a washer 15, and en agin said washer is an interiorly-threaded t imb e 16, having an exteriorly-knurled surface 17.- By adjusting the thimble 16 the tension of the spring 9 can be increased or decreased, as oecasion may necessitate.

In the opposite end of the sleeve 1 below the partition 5 is revolubly mounted a tapholder 18, the upper end of which is provided with a diametricallydisposed groove 19,

adapted to receive the block or lug 7 of the' driver-head 8. The tap-holder 18 is retained in the sleeve 1 by a thimble 20, which is held upon the sleeve 1 by the threads 4 thereof.

The block or lug 7 normally engages the tap-holder and causes it to revolve; but to permit of the driver-head easily receding when the resistance of the tap-holder is increased beyond a safe limit I bevel the Side edges of the lug 7 and the groove 19.

ln operation, the tension ofthe spring 9 maintams a frictional contact between the driver-head 8 and the tap-holder 18, the devree of friction being of sutlicient strength to drive the latter when said tap-holder is meeting with its ordinary or safe cutting resistance but should the resistance become excessive, which would tend to strainor break the ta socket, the tension of the spring 9 will e overcome and the blockor lug 7 Will slip and recede, permittin the ta -holder to remain stationary while t e shan 14 and its appurtenant parts would continue to revolve.

To facilitate the tension adjustment of the pring 9, the thimble 16 can be graduated, so the sleeve l contiguous to the thimble, whereby the amount of movement on the part of the Washer 10 can be expeditiously determined.

The driver-head 8, tap-holder 18, pins 11 and washers 10 and 15 are made of metal having tenacious and durable properties.

What I claim, and desire to secure by Letters Patent, is-

1. In a tap-socket, the combination with a ing through the said partition and engaging in the groove of said holder, yielding meansto normally hold said lug in said groove, Vand means to adjust' the last-named means, said adjusting means embodying a pluralityv 'of pins'` loosely mounted in the head of said shank and e aging the inst-mentioned means, anda t 'mble adjustably mounted upon said sleeve and. engaging said pins, substantially as described.

-2. In a tap-socket, the combination of a tapholder, a driver-shank having a head, asleeve eomctimg the head of ythe driver'- shank with the tap-holder, a partition Said sleeve i having an lopening therethrough, a driverhead seated on; said partition and having a lug projecting therethrough and engaging in a recess provided therefor in the end of the tap-holder, a spring inter osed between the driver-shank headl and t e driver-head `for normally holding the lug of the latter seated in the recessv the tap-holder, a .Washer restin on said spring, pins loosely mounted in the driver-shank head and engaging said Washer and a on the sleeve and? engaging said pins for regulating the tension of' said sparing.v

In testimony Whereofl aiix my signature in the presence of two witnesses.

CHARLESy J. Witnesses 1 H; C. EvEaT, MAX SaoLovrrz) 

